Would 375 cc be too big? (photo)

It looks like 375cc will be fine for you. Try on the actual implants in a tight bra, is that the way you want to look at the beach or not. If you smile when you see yourself in the mirror, then you have decided on the right size. Good luck...

I don't think that 375 cc's is too large unless you are sure that you don't want to be anything larger than a C cup. No one can guarantee a cup size since it differs depending on the bra manufacturer. I would suggest trying on the implants with a sports bra so you can visualize your post-op appearance. Good luck!